Heavy-Duty Smart Protection for Your LiFePO4 Battery Bank
Upgrade your solar system, RV, or marine battery bank with the Daly Smart BMS 4S 12V 40A/60A/100A/150A/200A/200A, Engineered specifically for 3.2V LiFePO4 cells, this premium intelligent Battery Management System ensures your energy storage operates at peak efficiency while offering military-grade safety protections.
Equipped with additional Bluetooth module, you can monitor your cell voltages, real-time current, and battery health instantly via the Smart APP (iOS/Android).
🛡️ 6-Fold Military-Grade Safety Protections
Never worry about overcharging or thermal runaway. The Daly Smart BMS monitors your pack 24/7 with lightning-fast response times:
- Over-Charge Protection: Prevents cell damage during high-current charging.
- Over-Discharge Protection: Stops your battery from draining past the safe voltage threshold.
- Over-Current Protection: Instantly cuts off the circuit during unexpected power surges.
- Short-Circuit Protection: Features a built-in automatic fuse mechanism.
- Temperature Protection: Monitored by an external NTC sensor to prevent charging below 0°C (32°F) or overheating.
- Smart Cell Balancing: Extends your battery lifespan by keeping all 4 cells at equal voltage.
📊 Comprehensive Technical Specifications
| Parameter | Specification |
|---|---|
| Battery Type | 4S 12V LiFePO4 (3.2V Nominal Per Cell) |
| Continuous Discharge Current | 40A / 60A / 100A / 150A / 200A / 250A (Optional) |
| Max Charging Current | 40A (for 40A) / 100A (for 100A) / 150A (for 150A) / 200A (for 200A) / 250A (for 250A) |
| Communication Interface | UART / Bluetooth APP |
| Balance Current | 100mA ± 30mA |
| Accessories | Bluetooth |
📦 What's in the Box? (Full Kit Included)
Every package comes as a complete kit, ready for installation:
- Daly Smart BMS × 1
- External Bluetooth Module × 1
- Matched Sampling Balance Wires × 1
- NTC Temperature Sensor Cable × 1
- Instruction Manual & Wiring Diagram × 1
⚠️ Crucial Installation Note for DIYers
Wiring Order is Everything: Always connect the B- cable (Main Negative) to the battery pack first, then plug in the sampling balance wires (from B0 to B4). Never plug in the balance wires before the main negative cable is securely fastened, or you may damage the BMS chips instantly.
🌍 Versatile Applications & Use Cases
The Daly Smart BMS 4S 12V is the heavy-duty control center for a wide range of deep-cycle LiFePO4 battery setups. Whether you are building an off-grid power system or upgrading your vehicle's energy storage, this BMS is perfectly optimized for:
- RV & Camper Van House Batteries: Keeps your living space powered safely during long boondocking trips.
- Off-Grid Solar Power Walls: Integrates seamlessly with solar charge controllers and low-voltage inverters.
- Marine & Boats: Provides reliable power for trolling motors, fish finders, and onboard electronics (IP65 waterproof protection).
- Golf Carts & Electric Vehicles: Handles high continuous discharge currents with stability.
- DIY LiFePO4 Power Stations: The safest choice for enthusiasts building custom battery packs using EVE, CATL, or Lishen 3.2V cells.
